{
  "schema_version": "1.4.0",
  "id": "GHSA-7wwm-8prx-hpg2",
  "modified": "2025-04-08T21:31:29Z",
  "published": "2023-01-17T21:30:21Z",
  "aliases": [
    "CVE-2021-36647"
  ],
  "details": "Use of a Broken or Risky Cryptographic Algorithm in the function mbedtls_mpi_exp_mod() in lignum.c in Mbed TLS Mbed TLS all versions before 3.0.0, 2.27.0 or 2.16.11 allows attackers with access to precise enough timing and memory access information (typically an untrusted operating system attacking a secure enclave such as SGX or the TrustZone secure world) to recover the private keys used in RSA.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
    }
  ],
  "affected": [],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-36647"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ARMmbed/mbedtls/releases"
    },
    {
      "type": "WEB",
      "url": "https://kouzili.com/Load-Step.pdf"
    },
    {
      "type": "WEB",
      "url": "https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-327"
    ],
    "severity": "MODERATE",
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-01-17T21:15:00Z"
  }
}